Threshold and process of constructing same



18 1 1,646,167 927 F. J. PLYM 4 v THRESHOLD AND PROC SS OF CONSTRUCTING SAME Filed Dec. 14, 1925- INVENTOR.

ATTORNEYS.

Patented 061.18, 1927.

UNITED I STATES I 1,646,167 PATENT OFFICE.

rRANCIs :r. PLYM, or NILES, MICHIGAN, ASSIGNOR TCTHE KAWNEER CO PA Y, or NILEs, MICHIGAN, A CORPORATION or MICHIGAN.

THRESHOLD AND PROCESS OF CONSTRUCTING SAME.

Application filed December 14, 1925. Serial No. 75,205.

The presentinvention relates to the formation of a threshold to exactly fit with a door and the process by which such threshold 1s constructed.

Among the objects of my invention 1S t0 provide a threshold which is easily set with relation to the floor.

To afford a threshold filled with nonslip material to form a tight fit threshold for a door.

To create a skeleton for a threshold adapted to be floated slightly more than full with cement or other non-slip material which will engage. the bottom of an adjacent door so that the door when swung ,while the material is still plastic will clear off just enough of the plastic material so as to Insure an exact fit.

To provide a threshold having no outside bolts or the like exposed above the floor, so that the threshold is smooth and there are no unsightly bolts or the like for a passerby Another object is, to create a process for constructing a threshold to exactly fit a door.

Further objects, advantages and capabilities will later more fully appear;

My invention further resides in the combination, construction and arrangement of parts illustrated in the accompanying drawings, and while I have shown therein a preferred embodiment of my invention, I wish it understood that the same is susceptible of modification and change without departing from the spirit of my invention.

Referring to the drawings, Fig. 1 is a fragmentary side elevation of the lower portion of a door and a threshold embodying my invention.

Fig. 2 is a vertical section along the line A of Fig. 1.

My invention more in detail consists of a trough 1 which may be constructed of metal or the like, to the bottom of which is attached a bolt- 2 havin an anchor head 3, such bolt being adjusta ly held to the metal trough by a nut 4. When it is desired to install the trough 1 for use, the floor 5 adjacent a door .0 is dug out to form a hole 6. This hole 6 is filled with plastic material such as sand and cement or the like 7 WVhile this filling material 7 is still plastic the bolt 2 with the anchor head 3 is inserted therein. IV here the door is large so that a large threshold is needed or it is otherwise deemed necessary, a plurality of holes 6 may receive and hold a plurality of bolts 2 spaced at convenient intervals on the bottom of the trough 1. When the plastic material 7 has hardened the anchor head 3 prevents any movement of the trough 1.

The trough 1 is filled slightly more than full of non-slip material such as cement or the like 8 so that the excess bulges out of the top of the trough 1 as at 9 in Fig. 2. lVhile this filling material 8 is still plastic the adjacent door 10 is swung open and cuts across the top of the filling material 8 and sweeps away the excess therefrom. Thence upon the hardening of the material 8 an exact fit of the door 10 and threshold is assured.

It will be seen that in the use of my invention there are no bolts appearing upon the surface of the floor or upon the exterior of the threshold upon which a person could trip or by means of which the threshold could be forced from engagement with the floor.

It will thus be seen that I have provided a threshold easy to install, inexpensive and simple to construct, more durable in nature, and eflicient in service and operation.

Having thus described my invention, I

claim: I The process of constructing a threshold comprising anchoring 'a trough at the position to be occupied by the threshold, then over-filling said trough with a self hardening plastic material so that said material will extend above the plane of the trough, and finally removing all excess plastic material to obtain an exact fit between said threshold and a contiguously mounted door, by swinging said door across the threshold and in contact with said material while it is still in a plastic condition.

In witness whereof, I hereunto subscribe my name to this specification.

FRANCIS J. PLYM. 

